image quartz_1

       大家好，今天我来为大家揭开“image quartz”的神秘面纱。为了让大家更好地理解这个问题，我将相关资料进行了整合，现在就让我们一起来探索吧。

1.如何把CMSampleBufferRef 转化为 NSData或者UIimage

如何把CMSampleBufferRef 转化为 NSData或者UIimage

       解决方法:

       #pragma mark Convert SampleBuffer to UIImage

       // Works only if pixel format is kCVPixelFormatType_420YpCbCr8BiPlanarFullRange

       - (UIImage *)convertSampleBufferToUIImageSampleBuffer:(CMSampleBufferRef)sampleBuffer{

       // Get a CMSampleBuffer's Core Video image buffer for the media data

       CVImageBufferRef imageBuffer = CMSampleBufferGetImageBuffer(sampleBuffer);

       // Lock the base address of the pixel buffer

       CVPixelBufferLockBaseAddress(imageBuffer, 0);

       // Get the number of bytes per row for the plane pixel buffer

       void *baseAddress = CVPixelBufferGetBaseAddressOfPlane(imageBuffer, 0);

       // Get the number of bytes per row for the plane pixel buffer

       size_t bytesPerRow = CVPixelBufferGetBytesPerRowOfPlane(imageBuffer,0);

       // Get the pixel buffer width and height

       size_t width = CVPixelBufferGetWidth(imageBuffer);

       size_t height = CVPixelBufferGetHeight(imageBuffer);

       // Create a device-dependent gray color space

       CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceGray();

       // Create a bitmap graphics context with the sample buffer data

       CGContextRef context = CGBitmapContextCreate(baseAddress, width, height, 8,

       bytesPerRow, colorSpace, kCGImageAlphaNone);

       // Create a Quartz image from the pixel data in the bitmap graphics context

       CGImageRef quartzImage = CGBitmapContextCreateImage(context);

       // Unlock the pixel buffer

       CVPixelBufferUnlockBaseAddress(imageBuffer,0);

       // Free up the context and color space

       CGContextRelease(context);

       CGColorSpaceRelease(colorSpace);

       // Create an image object from the Quartz image

       UIImage *image = [UIImage imageWithCGImage:quartzImage];

       // Release the Quartz image

       CGImageRelease(quartzImage);

       return (image);

       }

       好了，今天我们就此结束对“image quartz”的讲解。希望您已经对这个主题有了更深入的认识和理解。如果您有任何问题或需要进一步的信息，请随时告诉我，我将竭诚为您服务。